Test 1 Flashcards
biomechanics is the breakdown of what
biology - mechanics is statics and dynamics
statics of mechanics can be broken down into what
linear and angular
dynamics of mechanics can be broken down into
linear and angular
linear is what
all particles of a system move in the same direction in a straight line and cover the same distance in the same length of time at the same velocity.
angular is what
all particles of a system move around an angle and travel different distances in the same length of time
motor behavior is what
motor development, motor learning, motor control
mass standard unit
quantity of matter in an object (m) kg
weight standard unit
mass times gravity
gravity is what constant
9.81 m/s2
what is the unit for weight
newton
length standard unit
km or meters or cm
how to get to mass from weight
150lbs is 68kg then divide by 9.8 then it is 665.83n
direct conversation to lbs to newton
multiply lbs by 4.448
kinematics is what
study of motion
kinetics is what
study of forces
kinematics is broken down into what three things
position to velocity to acceleration
position(motion in space) is defined at what letters(symbol)
x,y
what’s the unit for position
meters
whatis the symbol for velocity
v
how to calculate velocity
position final - position initial / change in time
what is the units for change in velocity
m/s
acceleration symbol is what
little a
definition of acceleration
change in velocity over time
definition of velocity
change in position with time
formula for acceleration
velocity final - velocity initial / change in time
unit is what for acceleration
m/s2
what is the most common form of motion
general motion (has linear and angular motion)
absolute motion
one fixed frame of reference (ground)
relative motion
one fixed frame of reference and one moving frame of reference
anthropometrics
size shape and metrics of a human body limb
volume unit
meter/3
density unit
mass/volume
center of mass
single point on an object were we consider the effects of gravity to act
where is the highest velocity on an object
the distal end cuz it travels the most
vector vs scalar info
vector has direction and magnitude and a scalar quantity has magnitude only
displacement
straight line distance between final and initial distance
average vs instantaneous
average is were ur starting and ending, instantaneous is to see time frames that are close together (short)
is average or instantaneous the best measure for kinematics
instantaneous
angular kinematics symbol
O with a line in between
how much is one radiant in degree
57.3 degrees
instantaneous acceleration
slope of a line tangent to a velocity time curve
instantaneous velocity
slope of a line tangent to a position time curve
what does the slope of a line determine on a graph
if its pos neg or 0
if velocity is positive what would acceleration be
positive (acceleration and velocity follow each others slope)
examine the minima and maxima of a curve, what does this tell
whats going on with the next dirivitie(acceleration as you know position and velocity)
peak pos and peak neg acceleration is identified were on the graph
at the highest point on the positive slope and the lowest point on the negative slope
what are the quantities of a vector
direction and magnitude
sim 0 is what
opp/hyp
cos 0 is what
adj/hyp
tom 0 is what
opp/adj
some old hippy cought another hippy tripping on acid
opp is what on a triangle
line going up
adj is what on a triangle
line that is the bottom one
hyp is what on a triangle
top line
to get 0 by itself make what negative
cos, sin, or tom
